Condenser and leak for radiocircuits



May 11 1926. e. s. CORNISH 1,584,015

CONDENSER AND LEAK FOR RADIOGIRCUITS Filed Nov. 22, 1924 ATTO/PIVEK Patented May 11, 1926.

UNITED STATES 1,584,015 PATENT O FFICE.

GUY S. CORNISH, OF MADISONVILIIE, CINCINNATI, OHIO, ASSIGNOR TO THE CINCIN- NATI PATENT ENGINEERING COMPANY, A CORPORATION OF OHIO.

CONDENSER AND LEAK FOR BADIOCIRCUITS.

My invention relates to condensers and leaks for radio circuits.

The principal object of the present invention is to provide a simple and inexpensive fixed condenser and leak adapted to be introduced into the antenna circuit of a radio receiving set. I have found that the introduction of a fixed condenser of proper value and a leak into the antenna circuit of the receiver, results in greatly increased efficiency of the set as well as filtering out through the leak a large percentage of the noises produced by static which would otherwis interfere with clear reception of the desired signals.

Further objects of the invention will appear from the following detailed description thereof.

In the drawings:

Figure 1 is a perspective of a condenser and leak constructed in accordance with this invention.

Figure 2 is a plan view of the bottom of the device.

Figure 3 is a section on line ure 1.

Figures at and 5 are wiring diagrams illustrative of two methods of introducing the device into the antenna circuit of a receiving set for condenser and leak elfects. I

Figure 6 is a diagram introducing the device into a set as a leak only.

The numeral 1 indicates a plate of dielectric material, as, for instance, fibre, or similar substances. Longitudinally across the upper side of said plate is ametal strap 2, the ends 3 of which are turned over on the bottom, as shown in Figure 2. One end of said conductive strap is secured to the plate 1 by means of a binding post 4: and the other end by means of a rivet 5. Across the bottom of the plate 1 is a metal strap or plate 6, the ends 7 of which are turned over the top of the plate, as shown in Figure 1. One end of the strap 6 is secured to the plate 1 by means of a binding post 8 and the other end by means of a rivet 9. The straps 2 and 6, it will be observed, do not contact at any point with each other; the upper side of the dielectric plate 1, however, is provided with a leak 10 which may be acoating of india ink or other desired substance, and the bottom side with a coating 11 of the same material. When the binding posts 1 and 8 are connected into the antenna clrcuit of a receiving 3-3 of Figset, either as illustrated in Figure 4 or 5, it operates both as a fixed condenser by reason of the dielectric between the straps 2 and 8, and also as a leak through the india ink 1011. The leak coating 10 is extended as shown at 12 and a binding post 13 is mounted on the plate 1 in connection with said extension, as shown in Figure l. The device when connected by means of the posts 4; and 13, as shown in Figure 6, operates merely as a leak through the strap 2 and india ink 10 and extension 12.

From the foregoing description the nature of the present invention will be apparent to those skilled in the art to which the same appertains.

In Figures 4, 5 and 6 of the drawings, 1 have shown certain adaptations thereof to use in the antenna circuit of a radio set, but it will be understood that the utility of the device is not limited to the specific circuit connections therein shown, but that other connections may be adopted by experiment and that the best use of the device in any particular instance can be empirically ascertained by simple tests conveniently made.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A device of the character specified, comprising a dielectric plate, an electrically conductive strap mounted on one side of said plate and having its ends turned over so as to engage the other side, a second electrically conductive strap mounted on the opposite side of said plate and having its ends turned over to engage the first mentioned side of said plate, said straps being substantially at right angles to each other, and a binding post mounted in connection with each of said straps.

2. A device of the character specified, comprising a dielectric plate, an electrically conductive strap mounted on one side of said plate and having its ends turned over so as to engage the other side, a second electrically conductive strap mounted on the opposite side of said plate and having its ends turned over to engage the first mentioned side of said plate, said straps being substantially at right angles to each other, a binding post mounted in connection with each of said straps, and a coating of conductive material on said plate arranged to form a leak between said straps.

3. A device of the character specified,

comprising a dielectric plate, an electrically conductive strap mounted on one side of said plate and having its ends turned over so as to engage the other side, a second electrically conductive strap mounted on the opposite side of said plate and having its ends turned over to engage the first mentioned side of said plate, said straps being substantially at right angles to each other, a binding post mounted in connection with each of said straps, a coating of conductive material on said plate arranged to form a leak between said straps, and a binding post mounted in connection with said leak.

GUY S. CORNISH. 

